Revert "Remove useless const qualifier"

This reverts commit 277d6e1d016e69184fd49b867ff1268d3ff668f5.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "Detect and document dependency on -ldl on Linux, -lc on BSD for dlopen"

This reverts commit 90cefaa31af0a85593a155fba8570e04c653225a.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "ust-event.h: use BYTE_ORDER instead of __BYTE_ORDER"

This reverts commit 52367557562008ab80a94adbaf047dd44b282d15.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "Wrap FLOAT_WORD_ORDER"

This reverts commit c759fe81a6251b9feddf5cd9576278ffedf92ac3.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "Remove O_LARGEFILE from tests"

This reverts commit 626cb7f6174c4d9c22364f10d3d6a0915e53d5f3.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "Add configure amd64 support (for FreeBSD)"

This reverts commit 404d9909a392de0e0044c7f49a932d1765c9d813.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert "Remove gettid warning"

This reverts commit 4f41890f998c2c3778213ed2a8938534fb3060e1.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix: Return -EINVAL instead of print warning if non power of 2 size/num_subbuf

Reported-by: Tan Dung Le Tran <tan.dung.le.tran@ericsson.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

fix: on exit, leave thread/mmap reclaim to OS

Do NOT join threads: use of sys_futex makes it impossible to join the
threads without using async-cancel, but async-cancel is delivered by a
signal, which could hit the target thread anywhere in its code path,
including while the ust_lock() is held, causing a deadlock for the other
thread. Let the OS cleanup the threads if there are stalled in a
syscall.

wait_shm_mmap is used by listener threads outside of the ust lock, so we
cannot tear it down ourselves, because we cannot join on these threads.
Leave this task to the OS process exit.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

fix: Handle sys_futex with async cancel, add missing pthread_join

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

fix: Only munmap the wait page when not exiting from process

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use CPPFLAGS instead of CFLAGS for -I

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix type range comparison always false for 64-bit arch

ltt-events.c: In function 'ltt_event_create':
ltt-events.c:498: warning: comparison is always false due to limited
range of data type

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove gettid warning

Not so important, hides really useful warnings.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

demo: remove useless libs

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add configure amd64 support (for FreeBSD)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove O_LARGEFILE from tests

Not portable.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

tests: include missing headers

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Wrap FLOAT_WORD_ORDER

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

ust-event.h: use BYTE_ORDER instead of __BYTE_ORDER

available on both Linux and FreeBSD.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Detect and document dependency on -ldl on Linux, -lc on BSD for dlopen

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove useless const qualifier

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update uuid_create type cast

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Cast uuid_create parameter

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add freebsd rfork support

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

uuid.h should only be included when libuuid is detected

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Rename uuid.h wrapper to lttng-ust-uuid.h

So it does not clash with BSD system's uuid.h

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Create libuuid/libc uuid wrapper

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

configure.ac: check for both libuuid/libc uuid APIs

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use bsd-compatible fcntl for close-on-exec on socket

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use ENOMSG as fallback for ENODATA on freebsd

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use XSI-compliant strerror_r by default on non-Linux

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Compat layer for gettid

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

snprintf: fix namespace of snprintf types for freebsd

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add freebsd support for getcpu (use cpu nr 0)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add get proc name wrapper for FreeBSD

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix freebsd endian support

Need to use #elif defined().

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

fls: use local namespace to do not clash with FreeBSD string.h

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add FreeBSD compat layer for endian.h

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing limits.h include for NAME_MAX

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update Version to 2.0.0-rc1

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Standardize version across toolchain

closes #80

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix a typo in gen-tp Makefile

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Implement the .o file generation in lttng-gen-tp

(refs #40)

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update version to 1.9.8

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix comment in tracepoint.h

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add loglevel info to manpage

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove stale binary file

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add lttng-ust(3)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add a man page for lttng-gen-tp

(Closes #24)

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Install easy-ust and gen-tp examples in doc/

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Create the lttng-gen-tp tools as an helper to generate UST .h and .c files

Based on a template file which contains TRACEPOINT_EVENT definition, the
tools generate the necessary .h and .c to create the probes.

Include an example use in tests/gen-tp/

(refs #24)

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing #define _GNU_SOURCE for sched_getcpu()

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Define _GNU_SOURCE for all implementation files rather than getcpu.h

If implementation files include the sched.h header prior to having
_GNU_SOURCE defined by getcpu.h, we get in a situation where
sched_getcpu() can be undeclared.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add sched_getcpu and sysconf to AC_CHECK_FUNCS

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Mark lib_ring_buffer_print_errors unused

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Cleanup: remove extra space from easy_ust example

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing comma to tracepoint STAP_PROBEV call

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update version to 1.9.7

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

liblttng-ust-java: add missing -classpath ./

Now both gcj and OpenJDK work fine.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Only specify that sdt.h provides system integration for now

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add STAP_PROBEV check ton configure.ac

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add sdt.h integration

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove extern C around probe header

Not required, and prohibits sdt.h from declaring templates from
tracepoint.h.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Move lttng/config.h to lttng/ust-config.h, and use LTTNG_UST_ namespace

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add a configure report at the end of the output

Sorry, couldn't help myself...

Signed-off-by: Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add sdt.h integration option

It is not wired to anything yet, but we can at least build
the package with that option enabled.

Signed-off-by: Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Set default loglevel in metadata

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix: LTTng-UST java jni wrapper does not build with OpenJDK

bugs.lttng.org: fixes #9

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Version 1.9.6

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix tracepoint.h multiple .o within module/core exec linkage bug

We need all symbols looked up with dlopen to share the same linkage
property as the __tracepoint_registered variable (shared across .o in a
module/executable), otherwise only the first .o which runs its
constructor will have those defined.

Caused some tracepoints not to be traced in non-_LGPL_SOURCE
applications, due to the check:

if (!TP_RCU_LINK_TEST())   \
    return;

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

tracepoint: name -> _name to fix possible namespace clash

We use "name" as parameter in the macro.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add debug printout to tracepoint.c

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Rename liblttng-ust-libc to liblttng-ust-libc-wrapper

What a beautiful piece of code we can find in python:

/usr/lib/python2.6/ctypes/util.py:

    def _findLib_gcc(name):
        expr = r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)

Basically, this match any library having "libc.so" in its name. It
should be reported to python developers as a bug, but let's not be the
first to trigger the issue in the wild.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update hardcoded loglevel

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add "easy_ust" example

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update gitignore

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Zero-initialize struct msghdr

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add environment information

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix event-specific enabling

Bug introduced with loglevel as attributes implementation.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update static lib linking

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

liblttng-ust-libc: fix linking

Reported-by: Samuel Martin <smartin@aldebaran-robotics.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

liblttng-ust-libc: fix lib dependency

liblttng-ust-libc.so depends on liblttng-ust.so but does not link
against it.

z$ ../linux32-cross-i686-aldebaran-linux-gnu/bin/i686-aldebaran-linux-gnu-nm -CD output/target/usr/lib/liblttng-ust-libc.so | grep -E 'U ltt'
         U ltt_probe_register
         U ltt_probe_unregister
z$ ../linux32-cross-i686-aldebaran-linux-gnu/bin/i686-aldebaran-linux-gnu-ldd --root output/target/ output/target/usr/lib/liblttng-ust-libc.so
        liburcu-bp.so.1 => /usr/lib/liburcu-bp.so.1 (0xdeadbeef)
        libpthread.so.0 => /lib/libpthread.so.0 (0xdeadbeef)
        libc.so.6 => /lib/libc.so.6 (0xdeadbeef)
        ld-linux.so.2 => /lib/ld-linux.so.2 (0xdeadbeef)
        liburcu-common.so.1 => /usr/lib/liburcu-common.so.1 (0xdeadbeef)
        libuuid.so.1 => /lib/libuuid.so.1 (0xdeadbeef)
        libdl.so.2 => /lib/libdl.so.2 (0xdeadbeef)
z$ ../linux32-cross-i686-aldebaran-linux-gnu/bin/i686-aldebaran-linux-gnu-nm -CD output/target/usr/lib/liblttng-ust.so | grep ltt_probe_
0000a5cc T ltt_probe_register
0000a7d6 T ltt_probe_unregister
z$

Signed-off-by: Samuel Martin <smartin@aldebaran-robotics.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Install README and ChangeLog into system doc

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add hello-static-lib test

Test case where provider is located in a static library.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix static provider linking: introduce TRACEPOINT_PROBE_DYNAMIC_LINKAGE

We need to emit an unresolved symbol in the case where the provider is
put into a statically linked library, otherwise the linker removes the
provider object.

See README for details.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix 32-bit type: allocated len is used

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix 32-bit type mismatch

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add 1.9.5 Changelog

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update LTTng-UST version to 1.9.5

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

UST comm ABI: Add padding, push version to 2.0

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update loglevel names

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Implement loglevels as event and wildcard attributes

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update loglevel ABI: only loglevel value/enum is known by UST

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Pre-assign fixed loglevels

Some early LTTng-UST adopters brought to my attention that the way
tracepoint loglevels are currently specified in LTTng-UST might be too
relax for its own good. If each application define their own loglevel
names/values, it will become difficult to use the loglevels to select
"trace verbosity" in a system-wide manner.

Now that I come to think of it, it might make sense to pre-define a set
of supported loglevels, similarly to syslog(3). However, given that
tracing sometimes targets debug levels that are more fine-grained than
in the case of logs, I would propose to split the "debug" loglevel into
sub-categories.

My current thought is to simply just allow these loglevels. I doubt that
letting application developers specify extra loglevels on top of this
would be that useful, and it would certainly be more confusing.

In the list below, lower numbers means "low verbosity", higher numbers
means "high verbosity, debug-style information".

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove old (now unused) loglevel control code entirely

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update loglevel selection ABI

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use boot_id as monotonic clock uuid

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

clock: add clock description to metadata

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Properly fix the timekeeping overflow detection

The underlying issue was a mismatch between the ring buffer
configuration description of the number of clock bits (32) saved and the
actual number used (27).

Introduce LTTNG_COMPACT_EVENT_BITS and LTTNG_COMPACT_TSC_BITS across the
code to remove all hardcoded instances of these values to ensure this
kind of mistake does not happen again.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reported-by: Sébastien Barthélémy <barthelemy@crans.org>